Sunan Ibn Majah Book 25, Hadith 95
I heard the Messenger of Allah (ﷺ) say,
when he
was in ‘Aqiq: “Someone came to me from my Lord and said: ‘Pray
in this blessed valley and say: (I intend to do) ‘Umrah in Hajj.’”
“Whoever enters Ihram for Hajj and ‘Umrah, one Tawaf is sufficient for both, and he should not exit Ihram until he has completed his Hajj, when he should exit Ihram for both.”
“The Messenger of Allah (ﷺ) stood up to deliver a speech in this valley, and said: ‘Lo! ‘Umrah has been included in Hajj until the Day of Resurrection.”